Anyone who doesn't want to put too much weight in the back pockets of his jersey, or who prefers to carry extra items, can benefit from a top tube bag. The lean design ensures your knees don't touch the bag wile pedalling. This top tube is large enough to carry a cellphone, power bank, snacks and a bike wallet. The bottom part won't scratch your frame and adds extra grip so the bag won't move. There are two positions for the fixation around the head tube so even for smaller riders the top tube bag won't interfere with the movement of the handlebars. The two little side pockets on the bag are perfect to stow energy bar wrappers. Please note that, although the fabric and zipper are waterproof, this top tube bag is not fully waterproof because the seems are not sealed.